1fdfd401e07786b38a27180183657efa27618206167235b7471c6c545c875f77

Analysis

max time kernel
151s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:34

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General

Target

2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe
Size

31KB
MD5

48db9084a6a3af3cf656451b4eea5f6a
SHA1

8417ca58f51a9d09be94dd6fdd05de2d5d0d693a
SHA256

1fdfd401e07786b38a27180183657efa27618206167235b7471c6c545c875f77
SHA512

fb2b6e1a159ea5f7474d9a16bd8148ed26b27a04c6ae593eb75e6b0dc64c89828770c5ac71aef7992071cf0605150cf3b748d7669e107851f8a8f071ea81e66f
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U8Ss87vhl:b/yC4GyNM01GuQMNXum+NSnl

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\retln.exe	CryptoLocker_rule2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

2644 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2644	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe

description	pid	process	target process
PID 3604 wrote to memory of 2644	3604	2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe	retln.exe
PID 3604 wrote to memory of 2644	3604	2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe	retln.exe
PID 3604 wrote to memory of 2644	3604	2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_48db9084a6a3af3cf656451b4eea5f6a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3604

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:2644

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4036 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:2040

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe
Filesize
31KB

MD5
f08cae77647b9d67996526bda2239657

SHA1
c4b88b5410ecd648b32c7917ad92d8400538c79e

SHA256
df2bffd40af92246018135a8380ea8c091033e62165a4637e074851a99d8f92a

SHA512
482261f051aaace65adacd5f69dc0e3f5c3b688f0d946196c5a484bb13fd8f019eebe30a2fea661cf49e7de3e1a7a0442ec32f6fb099adfa67cae4489ba39f74

Download Submit
memory/2644-26-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/3604-0-0x00000000022D0000-0x00000000022D6000-memory.dmp

Filesize
24KB

Download
memory/3604-1-0x00000000022D0000-0x00000000022D6000-memory.dmp

Filesize
24KB

Download
memory/3604-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download